Regenerative furnace.



-T. F. BAILY 81 F. T. COPE.

REGENERATIVE FURNACE.

APPLICATION FILED JAN.25.1918.

1,286,907. Patented Dec. 10, 1918.

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REGENERATIVE FURNACE. APPLICATION FILED JAN. 25. ms. LQSE QUZ, Patented Dec. 10,1918.

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1 PM 1 00,00, V //v1//v 70/95 sion of a low temperature regenerative furwithout departing .tion illustrated in the accompanying draw- REGENERATIVE FURNACE.

1,286,901 Specification of Letters Patent. Patented Dec, 10, 1918,

' Application filed January 25, 1918. Serial No. 213,631.

To all whom it may concern:

Be it known that we, THADDEUS F. BAILY and FRANK T. Corn, citizens of the United States, both residing at Alliance, in the county of Stark and State of Ohio, have invented a new and useful Regenerative Furnace, of which the following is a specification.

This invention relates to electric furnaces and has more especial reference to a regenerative furnace adapted to be operated at low temperature for the treatment of small articles.

The object of the invention like, said hood being of any length desired or necessary for the particular kind of work for which 1t is to be used.

The object of the said hood will be to pre vent the escape of the heat into the outside atmosphere from the train of material leaving the furnace, which train is to be more fully hereinafter described. The heat thus inclosed will be absorbed by the train of material entering the furnace, also to be hereinafter more fully described. Thus a regenerative operation takes place by the use of the hood and for this reason the hood may be specifically described as a regenerative hood.

Extending entirely through the heating chamber and regenerative hood and projectis the provinace designed for the efiicient and economic heat treatment of small articles. ing through the door 3 at the usual extrem- A further object is the provision of a furlty of said hood is a bed 4 formed of suitnace of this character with means for passable heat resisting material and supported ing the'articles to be heat treated into and at lntervals upon the spaced walls 5 which out of the furnace. walls also support the resistance troughs 6 With these objects in view the invention which are located within the heating chamconsists in the novel construction and arber and at each side of the bed 4 said resistrangement of parts, hereinafter described, ance troughs carrying the resistance mateillustrated in the accompanying drawings, rial and electrodes 7. Each trough consists andparticularly pointed out in the append; preferably of the lower wall 8 and the up ed claims, it. being understood that various right 3111s 9 formed of fire brick or other changes in the form, proportions, size and suitable material. Each of these troughs is minor details of construction may be made filled Wlth a resistance body consisting of within the scope of the appended claims, a carbonaceous material In granular form such as crushed coke, charcoal or the like,

from the spirit or sacriadvantages of the invensaidcarbonaceous material being designated in the drawings by the numeral 10. The

electrodes 7 are embedded in the resistance material, preferably. near each extremity of ficing any of the tion.

In the accompanying drawings: Figure l is a sectional plan view taken on the line 1-1, Fig. 2. each trough, said electrodes extending Fig. 2 is a section on the line 2-2, Fig. 1. through the furnace walls as shown in the 3 is a section on the line 3-3, Fig. 1. drawings. It Wlll be understood that the Fig. 4 is a view similar to Fig. 1 showing another adaptation of the furnace.

Fig. 5 is a section on the line 55, Fig. 4.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawing.

Referring more especially to the construcelectrodes 7 should be arranged in an electric circuit, such construction being well known in this art. Electric wires 11 are shown connected to each of the electrodes 7, said wires leading to a suitable source of electricity. When the current is supplied to the electrodes it will be conducted from one ings, the numeral 1 indicates the heating chamber of the furnace which is preferably formed of fire brick or other suitable heat resisting material and which communicates with the reduced hood 2, also formed of heat resisting material such as fire brick or the electrode to the other through the resistance material, thus raising the said resistance material to an intense heat. It will of course be understood that gas or other heating means may be provided in the heating chamber instead of the electric means above described.

material through the regenerative hood and furnace operated by pusher 14 being operated by a fluid cylinder tremity Located above the table 4 and spaced therefrom is a second table 12 which ter- '4 as indicated at 13. Suitablemeans is provided for pushing the material to be heat treated through the door3 upon the upper table 12 and for pushing the material out of the furnace from the other extremity thereof. For the purpose of illustration a pusher is shown at each extremity of the a fluid cylinder, the

15 and arranged to push the articles to be treated in the furnace designated by the letter A through the door 3 and into the regenerative hood upon the upper table 12, As each new article is placed in position at the door 3 and the pusher operated it will be seen that all of the articles ahead thereof upon the table 12 will be moved forward, the foremost of said articles being pushed from the table 12 at the innerexthereof and allowed to drop upon the lower table 4 as indicated at B. A the pusher 16 is operated by means of the fluid cylinder 17 the articles which have thus dropped upon the table 4 are pushed to the back through the regenerative hood and are ejected onev at a time through thedoor 3 thereof from where they may be removed. As shown in Fig. 3 a casing 18 may be provided around the furnace for the purpose of retaining the heat within the walls of said furnace.

It will beseen from the above escription and inspection of the drawings that with this construction a furnace is provided which is especially adapted for operation at a low temperature for the heat treatment of.

small articles which could not be convenienrly handled in the ordinary manner.

Referring to the construction.illustrated inFigs. 4 and 5 of the drawings, a slight modification is shown in these figures, means being provided for passing two trains of furnacein the same horizontal plane and for transferring material from one train to the other after it has passed through the regenerative hood and heating chamber and for passing this treated material back outof the heating chamber and through the regenerative hood.

In this construction the heating chamber '19 is formed-in the usual manner and pro- -vided with the resistance elements 20 -lo-' cated at each side thereof, the regenerative hood 21 communicating with the heating chamber and being of any desired length. Provided at the opposite extremity of the a small reduced portion from one train to the other takes place.

Located through the entire length of the in the drawings.

furnace is a table 23 upon which the material is moved, said table being located between the resistance elements 20 as shown Suitable means is provided for'pushing the material to be heat treated through the regenerative hood and heating chamber upon the tablel- 23, for transferring the material to the outgoing train and for pushing the material out of the furnace from the other extremity there-- of, after the same has been subjected to the heat treatment and transferred to the outgoing train. For the purpose of illustration a pusher operated by a fluid cylinder is shown at each extremity of the furnace and in the reduced portion 22 bytransferring the material. The pusher 24 is operated by a fluid cylinder'25 and arranged to push the articles to be heat treated in the furnace designated by the letter C through the regenerative hood and heating chamber upon the table 23, as each new article is placed in position upon the table 23 at the open end of the regenerative hood, the pusher 24: is operated, moving said article and all of the articles ahead thereof in the incoming train forward, the foremost of said articles being moved to the position indicated by the letter B. As the pusher 26 is operated by means of the fluid cylinder 27. the article indicated by'the letter D will be moved transversely across the table 23 to the outgoing train and as the pusher 28 is operated by means of the fluid cylinder 29, the articles in the outgoing train arepushed step by step back through the heatingcham- I her and the regenerative hood and are re.- jected one at a time from the openend of the regenerative hood from where they may be removed.

We claim: j

1. A furnace comprising a heating chamber and a regenerative hood and means for passing -a continuous train of material through the furnace and heating chamber and back through the regenerative hood.

2. A furnace comprising a heating chamber and a regenerative hood and two trains of material moving in two parallel directions through said furnace, one of said trains of material being'located above the other and means for dropping material from the upper to the lower train.

3. A furnace comprising a heating chamher and a regenerative hood, means for passing material through the regenerative hood and heating chamber and dropping the ma terial to a lower plane and means for pushing the material out thropgh the heating chamber and regenerative hood in said lower plane. l

A. A furnace comprising a heating chamber and a regenerative hood, a pair of spaced table's located in different vertical planes,

means for pushing material into the furnace upon the upper table and means for pushing vthe material out of the furnace upon'the lower table.

5. A. furnace comprising a heating chamwithin said furnace, the upper table terminating within said heating chamber short of the lower table, means for pushingmaterial to be treated into the furnace upon .10

the upper table and on tothe lower table and means for pushing the material out oi the furnace upon the lower table.

In testimony that we claim the above, we

have hereunto subscribed our names.

. 'THADDEUS F. BAILY.

FRANK T. corn. 

